Stock-feeding mechanism for swaging machines



y 11, 1944- J. B. TIEDEMANN' ETAL 2,353,526

swocx FEEDING MECHANISM FOR SWAGING MACHINES Filed June 19, 1941 4 Sheets-@heet 1 Av M W 6 6 Z Z u M 6 55%? 5 9% Julius Bfiedemarzn BerfzZ 6.1 1/1n5tr01n INVENTORS.

% Z KW ATTORNEY.

y 1944- J. B. TIEDEMANN ETAL, 2,353,526

STOCK FEEDING MECHANISM FOR SWAGING MACHINES Filed June 19, 1941 4 Sheets-Sheet 3 JuliusBJ'z'edemann Bertz'l G. Winstrom INVENTORSI ATTORNEY.

y 1944- J. B. TIEDEMANN ET AL STOCK FEEDING MECHANISM FOR SWAGiNG MACHINES 4 Sheets-Sheet 4 Filed June 19, 1941 FIG. 5.

l6 Z8 Z9 3/ "--C MO Bra /3/ 7 6 Q n Z9 v Z8 JaZiusEI/"iedemann Bertz'l G.Winstr0m INVENTORS.

l6 W BY Patented July 11, 1944 s'rocmrnanme MECHANISM roa SWAGING memes Julius B. Tledemann, Milwaukee, and Berti! G. Winstrom, Granville, Wis., assignors to A. 0. Smith Corporation, Milwaukee, Wis.,acorpora- V tion of New York Application June 19, 1941, Serial No. 398,796

9 Claims.

This invention relates to stock feeding mechanism for swaging machines.

An object of the invention. is to provide improved mechanism of this character for intermittently' feeding and rotating tubular stock in synchronism with intermittently closing dies of the swaging machine.

A further object of the invention is to pro vide a device of this character in which bearings and other important parts are shielded against the heat radiated from hot tubular stock passing through it.

These and other objects of the invention will be clear from the following detailed description and the drawings in which:

Figure 1 is a top plan view of two feeding devices in schematic relation to the swaging machine;

Fig. 2 is a side elevation showing the drive for the feeding devices and the means for synchronizing them with the swaging machine;

Fig. 3 is a top plan view of the feeding mech anism on an enlarged scale;

Fig. 4 is an end elevation, partly in section on line 4-4 of Fig. 3, looking towards the left;

Fig. 5 is a vertical section on line 5-5 of Fig. 3; and.

Fig. 6 isa sectional view on'the line 66 of Fig. 4, partly broken away and with parts omitted.

The stock or pipe feeding mechanism comprises a housing I mounted on guides 2 so as to be free to, slide back and forth longitudinally of pipe 3. Within the housing, a hollow shaft 4 unites the two end members 5 and twhich are mounted/to rotate on bearings l in the housing. Oil seals 8 are provided between the housing and the two end members to retain lubricating oil within the housing. The shaft 4 and end members 5 and 6 are rigidly secured together and are rotated as a unit by shaft 9 driving through gear l0, idler gear H, and gear l2 fastened to the shaft 4.

Rigidly secured to the end member 5 and around it. If the shaft 4 were mounted to rotate inside bearings in the housing, expansion due to heating of the shaft by the pipes passing through it might cause the shaft to bind in the bearings.

Lubricating oil is. supplied tothe bearings under pressure and passes from them into the housing where it is splashed around to lubricate the gears and other parts of the mechanism. The oil may be circulated at a suflicient rate to remove heat transmitted from the hot pipes and keep the mechanism cool.

a Two shafts l8 are mounted in bearings II in end member 8. Two arms l8 are secured to each shaft inside the housing and carry'between them at their free ends a cam roller IS. The cam rollers bear against a cam surface formed of two cams 20, each of which is supported on a cross head 22 movable between, guides 23. Air cylinders 24 are mounted in trunnions 25 to act through levers 26 and cylindrical thrust.

block 21 to move the crossheads 22 and cams 20 towards or away from'. the center of the machine. n v

Externally of end members 6, each of the shafts l6 carries an arm 28. These arms are pressed apart by springs 28 which act to hold the cam rollers l9 pressed against cams 20. A law 30 for grasping the pipe is mounted on each arm 28. Springs 3| between the arms and jaws provide a resilient mounting for the jaws and insure the gripping of the pipe irrespective of the slight variations in dimensions inevitable in quantity production.

The swaging machine 32, with which the feeding mechanism is designed to operate, may comprise two intermittently operating dies 33. driven by any suitable mechanism. Two feeders will normally be used with each swaging machine, one to feed pipe to it, and one to remove pipe from it. The feeders are moved longitudinally of the pipe axis in synchronism with the swaging dies by means which are connected to the main drive for the swaging machine, and act on the tie rods 34 connecting the two feeders.

To provide for the longitudinal movement of the feeding devices, eachshaft! is splined within a driving sleeve 26 secured to the end of a shaft 36 rotated in synchronism with the. swaging machine by gearing I]. V

The operation of the feeding mechanism is as follows: When a new section of pipe is to be fed to-the machine, air is applied to the air cylinders 24 to S parate cams 20. The arms 28 are forced apart by springs 28 to keep the jaws 30 from closing upon the pipe which can therefore be run rapidly into position by feed rolls not shown in the drawing. When the pipe nears the swaging machine, the air cylinders are used to force cams 20 together. As end member- 6 rotates on its axis, the cam rollers l9 follow the cam surface and cause the jaws 30 to alternately open and close upon the pipe. In their closed position, the jaws grip the pipe between them, rotate it on its axis, and move it forward by virtue of the forward motionof the feeder. The feeder is synchronized with the swaging machine to make the feeding and turning of the pipe come at a time when it is not gripped between dies 33. Upon completion of the feeding stroke, the cam allows the cam rollers l9 and the Jaws 30 to recede from the center line of the machine, thus releasing the pipe from the feeder in preparation for another stroke of dies 33. The pipe travels intermittently through the machine until it is all reduced in diameter. The invention is claimed as follows:

1. A device of the class described comprising a housing, means to impart an axial reciprocating movement to the housing, constantly rotating mechanism within the housing with an axial opening for the passage of stock to be fed, jaws outside the housing carried by the rotating mechanism, means within the housing to cause the jaws to intermittently grip the stock in order to efiect its rotation and forward feed, and means for making said last named means inoperative to provide for rapid insertion and removal of the stock from the device.

2. A device of the class described comprising constantly rotating mechanism with an axial opening therethroughfor the passage of stock to be fed, a shield of heat insulating material within the opening, means for imparting an axial reciprocating movement to the mechanism, means on said rotating mechanism for intermittently gripping the stock to eflect its rotation and forward feed, and means for making said gripping means inoperative to provide for rapid insertion and removal of stock.

3. In a device of the class described, a housing, constantly rotating mechanism within the,

housing with an axial opening therethrough for the passage of heated stock, and a bearing between the housing and rotating mechanism, said bearing having its internal member secured to the housing and its outer member secured to -the rotating mechanism whereby expansion of the mechanism and outer member of the bearing by heat transmitted from the heated stock increases the clearance between the two members of the bearing.

member secured to the rotatable mechanism whereby expansion of the mechanism and external member of the bearing by heat transmitted from the heated stock increases the clearance between the two members of the bearing.

5. In a. device of the class described with an external support and an internal rotatable mechanism.

6. A pipe feeding device comprising a housing, a. rotatin member within the housing with an axial opening therethrouglr for the passage of pipe-and an end section closing one end of the housing, a plurality of shafts parallel to the axis of the rotating member but displaced therefrom mounted in hearings in the end section and projecting inside and outside the housing, an arm secured to each shaft inside the housing, a cam roller carried by the arm, a second arm'secured to each shaft outside the housing carrying a jaw to grip the pipe, means to normally spread the jaw apart, cam surfaces within the housing to bear against the cam rollers and force the jaws to close during a part of each revolution of therotating member, and means to move the cam surfaces out of engagement with the cam rollers to permit the jaws to remain open throughout an entire revolution of the rotating member.

I. A device of the class described comprising a housing, means to impart an axial reciprocating movement to the housing, constantly rotating mechanism within the housing with an axial opening for the passage of stock to be fed, jaws outside the housing carried by the rotating mechanism, and means within the housing to cause the jaws to intermittently grip the stock in order to eflect its rotation and forward feed.

8. A device of the class described comprising constantly rotating mechanism with an axial opening therethrough forthe passage of stock to' be fed, a shield of heat insulating material within the opening, means for imparting an axial reciprocating movement to the mechanism, and means on said rotating mechanism for intermittently gripping the stock to efiect its rotation and forward feed.

9. A device of the class described comprising a constantly rotating member having an axial opening, for receiving stock to be fed, therethrough, means operated by said member to intermittently grip the stock, mechanism rendering said means inoperative at will independently JULIUS B. TEDEMANN. BERTIL G. WINSTROM'. 

